What is a solid figure with two parallel congruent bases joined by a rectangular faces is a?

(hurry! ) which expression is equivalent to the following complex fraction?

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?